Ethernet and Wi-Fi Connection at a Time

For several years now, I have been using a laptop to connect to Internet, browse the web, play and even to work, but all of this time I have been connected via Wi-Fi to move freely around the house.
However, since some weeks ago I thought to better let the laptop lying on my desk , and therefore is now connected via Ethernet.

Even though I'm wondering if it's okay being connected via Wi-Fi and Ethernet at a time, of if they interfere with each other or, on the contrary, it might improve my connection.